Air injection nozzle



May 12, 1942. F. B. TODD AIR INJECTION NOZZLE Filed Aug. 17, 1940Patented -May 12, 1942 UNITED STATES PAT-ENT OFFICE AIR INJECTION NOZZLEFrancis Byron 'lodd, Attalla, Ala. Application August 17 1940, SerialNo. 353,079

2 Claims.

pliers to hold the valve stem in position when an air hose is pressedagainst the open end of the valve stem to infiate the tube. As a resultof this practice the operator would often damage the valve stem, orwouldpermit the valve stem to slip inside the casing through the openingin the tire rim and thereby make it necessary to puncture the innertube, remove the tire casing, repair the inner tube, replace the tubeand casing on the rim, and then again attemptto inflate the inner tube.

Briefly, my invention comprises a nozzle having a central passagewayextending therethrough for the passage of air. One end of the nozzle isprovided with internal threads to receive the threaded end of a valvestem, while the other end of the nozzle is formed to be inserted intothe outlet end of the usual air hose employed in inflating inner tubes.The nozzle may be formed in several ways to hold the engaged valve stemagainst displacement while the inner tube is being inflated and willhereinafter be described in reference to the accompanying drawing. Thethreaded end of the nozzle is in the form of a threading die to reformthe external threads of valve stems. A tap is mounted on the nozzle forreforming the internal threads of valve stems,

which are hereinafter set forth in the specification and claims andillustrated in the accompanying drawing, forming part thereof, wherein:

Fig. 1 is a transverse sectional view showing a tire casing and innertube mounted on a tire rim and my improved air injection nozzlepositioned on the valve stem of the inner tube, the nozzle being shownin longitudinal section;

Fig. 2 is a top plan view showing the nozzle;

and

Fig. 4 is a sectional view showing a modified form of my invention.

Referring now to the drawing for a better understanding of my invention,I show a tire rim 8. The tire rim is formed with the usual aperture 9through which the valve stem Ill of the inner tube is extended forengagement with an air hose (not shown) when the tube is to be inflated.The valve'stem I0 is provided with internal threads to, receive theusual valve (not shown), and with external threads H 'to receive theusual cap (not shown). The parts thus far described are of standardconstruction and form no part of the present invention other than toillustrate the application of the air injection nozzle I2 thereto.

The nozzle I2 is provided with a passageway [3 which extendstherethrough. One end of the nozzle is provided with internal threads Hto receive the threaded end of the valve stem i0; while the other end ofthe nozzle is tapered at l5 for insertion into the outlet end of an airhose. A stop shoulder i6 is formed in the passageway [3 for engagementwith the end of the valve stem. Radially disposed slots ll are formed inthe threaded end of the nozzle. A transverse opening I8 is formed in thenozzle to receive a tap' [9 which is provided with threads 20 at its oneend and with fingers 2| at its other end.

In Fig. 4-1 show a modified form of my invention in which the nozzle 25is formed with a passageway 26. One end of the nozzle is provided withinternal threads '21, and the other end is tapered at 28. A cable orchain 29 has its one end secured to the nozzle and its other end securedto a ring 30.

In the operation of my improved nozzle, the nozzle is threaded onto thevalve stem of a deflated inner tube and any deformed threads on thevalve stem are reformed. An air hose is then applied to the tapered endof the nozzle to inflate the inner tube. It will be observed that eitherthe size of the nozzle, or the tap, or the ring will prevent a movementof the nozzle through the rim aperture 9. The valve in the valve stemmay be removed by means of the fingers 2| on the end of the tap, and theinternal threads on the valve stem may be reformed by the tap l9.

While I have shown my invention in but two forms it is obvious to thoseskilled in the art that it is not so limited but is susceptible of vari-Fig. 3 is a side elevational view of the nozzle;

ous changes and modifications without departing from the spirit thereof.

I claim:

1. In an air injection nozzle for attachmentv to a valve stem of aninner tube of a pneumatic tire of the type mounted on a metal rim and inwhich the valve stem projects through an aperture casing 15 and an innertube I mounted on a tire formed in the metal rim, comprising anon-resilment therewith, for engagement with the tire rim to prevent amovement ofthe body portion through the aperture in the tire rim.

2. A nozzle according to claim 1 in which, a valve repair tool ismounted transversely on the body portion to prevent an inwarddisplacement of the body portion through the aperture in the tire rimwhen the inner tube is being inflated.

FRANCIS BYRON TODD.

